Liner puller



June 16, 1959 fr W//7 C. Fora INVENTOR.

E. 0. FORD LINER FULLER June 16, 1959 Filed June 14.

2 Sheets-Sheet 2 VIA/AI 452m A T. b

Unite States 2,890,520 Patented June 16, 1959 ice LINER PULLER Erwin 'C.Ford, Houston, Tex., assignor to Pioneer Specialtics, Inc., Houston,Tex., a corporation of Texas Application June 14, 1954, Serial No.436,384

7 'Claims. ((31. 29--252) This invention relates to new and usefulimprove ments in a liner puller.

It is an object of this invention to provide a puller for pump liners,and the like, that will pull liners from pumps of various sizes of thetype commonly used in petroleum pipe lines, and in the oil fields.

It is another object of the invention to provide a roller for liners,and the like, that may be readily and easily applied to a pump housingand that may be readily and easily adjusted to the housing of a seriesof various size pumps.

It is still another object of the invention to provide a puller for pumpliners, and the like, that may be operated by hydraulic pressure, or bymechanical pressure, or both.

It is still another object of the invention to provide a puller forliners, and the like, having a novel means for selectively applying thedevice to various sizes of pumps.

It is still another object of the invention to provide a puller for pumpliners, and the like, that may be employed without the necessity ofremoving the pump rod.

With the above and other objects in view, the invention has relation tocertain novel features of construction and arrangement of parts moreparticularly defined in the following specifications and illustrated inthe accompanying drawings, wherein:

Figure 1 is a horizontal view, partially in cross section.

Figure 2 is an end view, taken on the line 22 of Figure 1.

Figure 3 is an end view, in cross section, taken on the line 3-3 ofFigure 1.

Figure 4 is a horizontal cross sectional view taken on the line 4-4 ofFigure 1.

Figure 5 is an end view of the puller head, taken on the line 55 ofFigure 4, and

Figure 6 is a cross sectional view of the hydraulic piston taken on theline 6-6 of Figure 4.

Referring now more particularly to the drawings, the numeral 1designates a pump housing, such as commonly used in pipe lines, and thelike, in which a liner 2 is mounted in the usual manner, and which isequipped with the usual "head bolts 3. A cross bar 4, having theremovably mounted feet 5, 5, is adapted to fit on said housing 1. Thefeet 5 have bolt receiving chambers 6, at one end, and have guidemembers 7 at the other end. The chambers 6 receive one of the head bolts2 when the feet are moved into position, and the guides 7 align the bar4 and the feet 5 and maintain such alignment.

An externally threaded shaft -8 is mounted in and extends through thebar 4. Welded on the shaft 8 is a spacer block 9 adapted to abut againstthe bar '4 and limit the movement of the axially mounted puller head 10.The head 10 has a series of marginal notches 11, 11 comprising pairs ofdiametrically opposed notches of the same depth. The notches arearranged in pairs of various depths to accommodate various sizes ofpumps. An internally threaded socket 12 is formed in each notch and apair of longitudinal arms 13, 13 have one end mounted in said notches ofa given pair and secured in position in any suitable manner, such as bythe insertion of a bolt 14 through the arms and into the sockets 12.

If desired the connecting ends of the arms 13, 13 may be downwardlyturned, forming an abutting shoulder to fit against said head. Theopposing ends of said arms are outwardly turned to abut against the endface of the liner to be pulled. The end of said shaft 8, adjacent saidhead 10, may be provided with a flattened area to receive the jaws of awrench when it is desired to turn the shaft 8 manually.

A hydraulic jack is provided to assist in the pulling operation, such asthe jack 15, which consists of a housing having an internally threadedinsert 23 at one end adapted to receive the externally threaded portionof the head it), which forms a reduced hub. A piston 17 is mounted inthe housing 15 and is constantly urged into inactive position by thecoil spring 18, theinwardly extended end of the insert 23 acting as aguide for the spring it. A reduced piston 19 is axially mounted throughthe piston 17 and has an extended arm 25 designed to provide an extendedstroke to the piston 19. A suitable flexible conduit, as 20, isconnected at one end to the jack housing 15 and a hand operated pump, as21, may be employed to provide hydraulic pressure to the pistons 17, 19.

When it is desired to pull a liner, or the like, from a pump, the headis removed from the bolts 3 and the feet 5 are positioned on the bar 4so that the chambers 6 receive diametrically opposed bolts. anchored inplace by tightening the nuts which are mounted on the bolts 27, 27 whichmay be welded to the outside end wall of the feet 5, 5 or mounted in thefeet 5, 5 in any suitable manner. The guide members 7 restrict the feed5 against turning on the bar 4 and the slots 22, 22 in the bar 4 permita wide range of adjustment for various sizes of pump housings. Themounting of the bolts 27, 27 on one end face of the feet 5, 5, permitthe feet to be mounted on the bar 4v and positioned to extend outwardlytherefrom where large sizes of pumps are to be serviced, or extendinwardly as shown in the drawings to permit servicing of small sizes.The shaft 8 will be screwed in the bar 4 until the spacer block 9 abutsagainst the outer face of the bar 4. The arms l3, 13 are mounted in theproper notches 11, 11 according to the size of the pump being serviced.The pump rod 24 will be withdrawn to the extreme end of its stroke, andas the arms 13, 13 are inserted into the housing 1, the outwardly turnedends The feet 5 are thereof will pass between the piston rod 24 and theinside wall of the liner 2 and will be brought into contact with the endface of the liner 2, and the shaft 8 then screwed with a counterclockwise rotation until the slack is taken up and the head 10 abutsagainst the spacer block 9. The arms 13, 13 are held tightly in place inthe head 10 by the bolts 14, so that they will clear the end of thepiston rod 24 as they are moved into position. The jack 15 is thenmounted on the reduced hub 16 of the head 10, and the pump 21manipulated to apply hydraulic pressure to the piston 17. When thepiston 17 moves forwardly, it applies direct pressure to the shaft 8,forcing the head to move rearwardly, drawing the liner rearwardly withit, and when the piston reaches the end of its stroke it will abutagainst the inwardly extended end of the insert 23. The liner 2 willhave been started out of the pump housing, and the piston 19 will thenmove against the shaft 8 at a much faster speed than the speed of thepiston 17 continuing the movement of the head 10 rearwardly. When thepiston 19 reaches the end of its stroke, the jack 15 may bedisconnected, and the fluid therein permitted to run back into the pump21, and the pistons 17, 19 permitted to return to their initialposition, and the shaft 8 rotated manually until the head 10 again abutsthe spacer block 9 on the shaft 8. The rotation of the shaft 8 will benecessary to back it out the same distance as the liner has moved andthe initial movement of the liner may loosen same sufliciently so thatthe rotation of the shaft 8 may be continued and the liner removed byapplying a wrench to the flattened end of the shaft 8. However, if theliner does not readily yield to the manual rotation of the shaft 8, oragain becomes hard to move before it is completely removed from thepump, the jack 15 may be again connected to the head 10 and thehydraulic pressure again used to continue the outward movement of theliner 2.

It is customary to pack the liner in the housing with several packings(not shown) which tend to bind the liner in the housing. The action ofthe puller as above described will draw the liner out of the housinguntil the respective packings clear the restricted portion of thehousing. When the liner is free of the binding action of the packing, itwill be loose in the housing and the puller may be removed and the linerentirely and easily withdrawn by hand from the housing. The spacing ofthe bar 4 from the pump housing by means of the adjustable feet 5,permits the outer end of the liner to extend out of the housing as it ispulled out of the restricted area.

As is obvious the arms 13 may be provided with outwardly turned memberson the extended ends thereof to fit and pull valve seats, as well aspump liners, the length of the arms 13 being adjusted in accordance withthe respective valve.

When desired, the slots 22, 22 in the bar 4 may be enlarged in orderthat the feet 5 may be removed, and the slots in the ends of the bar 4positioned on the extending bolts 3 to anchor the bar in position on thepump housing, and the pull then effected as hereinabove described.

While the foregoing is considered a preferred form of the invention, itis by way of illustration only, the broad principle of the inventionbeing defined by the appended claims.

What I claim is:

1. In a liner puller, a bar member, a pair of adjustable feet on saidmember, a shaft adjustable in and extending through said bar having aportion thereof externally threaded, a head loosely mounted on saidshaft having a pair of arms mounted thereon, said arms having engagingmeans on their extended ends for engagement with a liner to be pulled,and means on said head for exerting hydraulic pressure against saidshaft moving said head longitudinally with relation to said shaft.

2. In a liner puller, a bar adapted to be mounted on the pump housing, apair of adjustable feet mounted on said bar, head bolt receivingchambers in said feet, a threaded shaft adjustably mounted in said bar,a puller head loosely mounted on sxid shaft, puller arms having one endanchored to said puller head and the other ends engaged with the endfaces of a liner to be pulled and means for exerting pressure againstsaid shaft to move said head longitudinally with relation to said shaftand pulling said liner.

3. In a liner puller, a bar adapted to be mounted on the pump housing, apair of adjustable feet mounted on said bar, head bolt receivingchambers in said feet, a partially threaded shaft mounted in said bar, apuller head loosely mounted on said shaft, puller arms having one endanchored to said puller head and the other ends engaged with the endfaces of a liner to be pulled and means for exerting pressure againstsaid shaft and moving said head longitudinally with relation to saidshaft comprising a hydraulic jack mounted on said head having a pair ofpistons thereon, said pistons abutting against the extended end of saidshaft and means for successively moving said pistons against said shaftmoving said head longitudinally with relation to said shaft and pullingsaid liner.

4. In a liner puller to be mounted on a pump housing, a transverse barmounted on said housing, a threaded shaft rotatably mounted in said barand extending into said housing, a head loosely mounted on said shaft, apair of arms mounted at one end on said head and at the other endabutting against the end face of the liner to be pulled, meansdetachably mounted on said head for exerting pressure against said shaftand pulling said liner.

5. In a liner puller for removing pump liners, a bar member having meansfor mounting said member on the extended bolts of the pump housing, saidbar member having an internally threaded port extending transverselytherethrough, an externally threaded shaft mounted in said port, apuller head loosely mounted on said shaft, puller arms removably mountedon said head, the extended ends of said arms being outwardly turnedforming liner engaging fingers, means detachably secured to said headfor exerting pressure against said shaft to move said head outwardlywith relation to said shaft.

6. In a liner puller for removing pump liners from a pump housing, a barmember having means for mounting said member on the extended bolts ofthe pump housing, said bar member having an internally threaded portextending transversely therethrough, a puller shaft having an externallythreaded area mounted in said port, a spacer block mounted on said shaftat the terminus of said threaded area, a puller head loosely mounted onsaid shaft on the unthreaded area thereof and movable longitudinallythereon adjacent said spacer block, puller arms removably mounted onsaid head, the extended ends of said arms being outwardly turned formingliner engaging fingers, means detachably mounted on said head forexerting pressure against said shaft to move said head and armsoutwardly with relation to said shaft.

7. In a liner puller for removing pump liners from a pump housing, a barmember having means for mounting said member on the extended bolts ofthe pump housing, said bar member having an internally threaded portextending transversely therethrough, a puller shaft having an externallythreaded area mounted in said port, a spacer block mounted on said shaftat the terminus of said threaded area, a puller head loosely mounted onthe unthreaded area of said shaft and movable longitudinally thereonadjacent said spacer block, puller arms removably mounted on said head,the extended ends of References Cited in the file of this patent UNITEDSTATES PATENTS Ragsdale Aug. 10, 1926 Staser Apr. 8, 1930 Heimbaph etal. June 29, 1937 Hancock Oct. 30, 1951 DHaem Nov. 11, 1952 Lee May 4,1954 Williams Aug. 16, 1955

